A Phase-based InSAR Tropospheric Correction Method for Interseismic Deformation Based on Short-period Interferograms

Shuai Wang, Zhong Lu, Bin Wang, Yufen Niu, Chuang Song, Xing Li, Zhang Feng Ma, Caijun Xu

Research output: Contribution to journalArticlepeer-review

Abstract

The new generation of SAR satellites is serving our long-standing demand for high-resolution crustal deformation over various scales. However, the reliability of InSAR measurements is still limited by varying tropospheric conditions between acquisitions, especially when mapping slow-deforming interseismic deformation. We propose here a new phase-based approach for mapping interseismic deformation using short-period interferograms. Our method formulates the InSAR phase after topographic correction as the sum of three components: (1) spatiotemporally varied turbulent tropospheric phase, (2) topography-correlated stratified tropospheric phase, and (3) interseismic-related deformation assumed to be accumulated at a constant rate. We simultaneously solve for the parameters in the model to avoid overestimating the tropospheric phases, especially when interseismic deformation and tropospheric delays are both coupled with elevation in space. Synthetic tests and practical applications to easternmost Altyn Tagh fault demonstrate that the new method can effectively recover the small-amplitude interseismic deformation caused by fault motion even when the interferograms are dominated by strong tropospheric delays.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Transactions on Geoscience and Remote Sensing
DOIs
StatePublished - Jul 19 2023

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • General Earth and Planetary Sciences

Fingerprint

Dive into the research topics of 'A Phase-based InSAR Tropospheric Correction Method for Interseismic Deformation Based on Short-period Interferograms'. Together they form a unique fingerprint.

Cite this